The total exposed surface area of 448 square units.
The image shows a drawing of a wooden park bench with rectangular slats for the seat and back. The dimensions of each slat are written next to it, and by adding the areas of all the visible slats, we get the total exposed surface area.
Here's the breakdown:
Seat slats: 2 slats at 98 sq units/slat = 196 sq units
Back slats: 2 slats at 108 sq units/slat = 216 sq units
Side supports: 2 slats at 118 sq units/slat = 236 sq units
Adding these up, we get the exposed surface area of the park bench is:
98 + 108 + 118 + 124 = 448 square units